use docker 1.8.1 in Dockerfile
use docker 1.8.1 in Dockerfile

sambooo/pachyderm,alexdebrie/pachyderm,kunthar/pachyderm,ShengjieLuo/pachyderm,sambooo/pachyderm,sambooo/pachyderm,klucar/pachyderm,alexdebrie/pachyderm,kunthar/pachyderm,ShengjieLuo/pachyderm,ShengjieLuo/pachyderm,klucar/pachyderm,alexdebrie/pachyderm,klucar/pachyderm